Draft-rigging for cars.



P. L. BARBER.

DRAFT BIGGING Pol nm. nruouloi mm? um: n. nos.

908,936. montan Jan. 5, 1909.

s NIT-En l srArinsArATENT OFFICE@ FRANKLIN L.

., 'DRAFT-moeras ron aus.

tobea fulllclear; and exactvdescription of the lnventionmsnch asV willena-ble others- ,slgilled mythe art to'which it appertains to make andilse the same.

My mventlon relates to draft-rigging for fears, and has` for itsespecial object to proridean'. improved s ring dampener orretardingdeyIce'there o r. `'Ihe'invention consists of the noveldeifices yand combinations of devices hereinafter describednand definedin the claims.

In the/"accompanying drawings which illustrate' thm'iniention, likecharacters irdicatI likezpa'r'ts throughout the several views. j eferrigto the drawings,-Figure 1 is a 5 view rinclpally in plan, but with some.parts Inhorliiont'al section, showing my im- ;=provecl draft rigging.Fi 2 is a view partly 1n' )sIde elevatlon van partly in section onthefline .rfr2 of Fig. 1. Fig 3 is a tnansverse-'ertical section takenon the line Y .rief Fig. et 1s a sectlon taken on the line' m4.ajyfofljFig. 2, some parts being removed, and-Fig2 5 is a detail insection on thelne Q'r'c' IOfjFigx 1. One o fltli fprincipalob'ects ofthis invenwti'onis 'ltoproyide al dra t rio'ging of highcapacityboth'fin respect to its ystand intensedraft'and bumpinvF strainsand yin ii'hich aconiparatively light `may be employed; Broadly stated,I accomlish this 'resultby providing' a frictional spring danipener orretarding device involvl ing` fr1ctionally engaglng plates or membersand cooperating" inclined or bevel surfaces@ hetivn'iylch anti-frictiondevices; such as rollers, arelnterposed.

TheV accompanying drawings illust-rate;

vrhat 'I believe to be the preferred form of algvngiy inIprovefddraftriggingl The ninneral 1 indicates the Vdraft timbers of a car, to which'a1-e bolted a pan' of laterally spaced draft platesliavmg theusualidraft lugs 3 near their extremities. These draft plates, as shown.are provided with integrally formed. longitudinally extended upperflanges l. -and withang'n a1 bearmgr strlps which latter are detac mhlysecure( Specication o! Letters Patent. Application filed June 28, 1906.Serial No. 328,842.

inlay to with-.

buffer spring Patented Jan. 5,1909.4

l to the respective plates'Q by mitted bolts o. l A transversetie-bar 7is bolted atrits ends l to the bottom intermediate portions of the ,lsaid draft plates 2. The numeral 8 indicates the draft bar of thecoupler, to which is' bolted the usual yoke 9, which latter, as shown,Ahas riveted within the arch of its extended end a filling' block 10. l l

The lnumeral 11 indicatesv a pair of folsARBER, or sT. BAUL, MINNESOTA,As'sIGNoR To W. n. MINER COMPANY, oF i oHIoAGo, ILLINoIs; A CORPORATIONoF ILLINOIS.

lowers both of which are embraced by the draft yoke 9. The most forwardor outward follower 11 normally bears against the end of the draft bar8, and coperates with the f forward or outward pair of draft lugsWhilethe rear or innermost follower 11 norf mally bears against thefilling block 10, and against the innermost pair of draft lugs 3. fAsshown, the followers l14 are provided with Yprojecting bosses or studportions 12. The followers 11 rest directly upon and are4 sup orted bythe 'detachable bearingstrips 5 o the draft plates 2. v

Placed Within the yoke 9 and between'the draft plates 2`is a thrust boxso-called which, as shown, is made up4 of a rectangular part 13 and acylindrical part 14. The rectangular part 13 is reinforced byencirclingrlbs 15 tiat give the saine great tensile strength in'crosssection. The-cylindricalsect-ion 14 l is provided with a rectangularhead 16 that bearsl directly against the outer follower 11. and has aperforation that receivesjtilie boss 1:2 thereof. Placed 'Within'VAthecyli'ndrical l ortion14 of the said thrust boicisaiooiled uiferspring 1T which, as shown, isIna'de up of concentric coils, and the'inner extremity ,of which bears-against. a spring cap 18. A glat. wed ebar 19 bears at its outer` end il against t ie spring cap'lS and` asshown`V has a reduced enr y This Wedge bar 19`is forme with a pluralityi ofdvergmg cam surfaces 21, or otherwise stated the said Wed e bar, vismade up of 'a phirality of integray connected longitudil nally 'alinedwedge section 21.

` Interposed between the Wedge bar land g the opposing inner surfaces ofthe rectafn nlar section 13 0f4 the thrust bonr are. we geplates'orbarsQQ 4that are provlded n'lthcaln i surfaces Q3correspondingin number tof'ancl arranged for coperation with theopposing wedge surfaces 21 of the wedge bar 19. The i said wedge plates22, tends, are provided with notched flanges Q4 at their projecting n sothat lengage with the boss 12-of the inner follower 11. Bearing rollersare interposed between the ('ipposiiigcaiiiiictiiig wedge surfaces 2land 213 of the wedge'bars 19'and 22. Hardened chatting )lates 26 arereferablv secured to the wei ge. lates or ars 22, for direct en agementwith osing' surfaces of tie rectangular section 3 of the .thrust box. y

As is'evidentthe spring 1T will be coinpressedboth under bumping 'and'`draft strains. Under bumpingstrains, however the' mier follower 11 willremain seated a inst the rating draft lugs 3, and tie outer vfo'liei-"ll will be moved away fro'in its cooperating draft lu 4s while pn. tietlie other hand, ,under dra t strains;

outer followerll will remain seated against' the coperating'draftliig-s, while the inner follower will; moved away from its cooperatin`draft lugs Under buinpn strains t ie'l so-called thrust box f 13-l4wi bemoved rearward, and will caused to travel frictionally over the cliaf'inplates 26, which latter as well-as the fed e bars oi.1 lates 22, willthen remain 4stationary; w

boi: remains stationary and the said chafin lates 26 and wedge plates 22are move orward. .Under both bum ing and draft 'strains there.,is, asisevi ent, a relative 26, which chaing plates movement and a.frictional ena ementbetween. the said thrust box andc fhig plates' are, as a matterof fact, part of 'thewedge pla'tes 22. Also, as isevident, under botibumpng and -draft strains the relative movement of the cam acting Wedgesurfaces 21 and 23, with re- 'spfect to the rollers 25, producelaterally outward pressure'of the wedge plates 22 against the co eratingfriction surfaces of thrust ox; and this pressure, and hence Vfrictionalengagement between lthe parts, will be approximatelf) proportionate .tothe intensity of the umpiiigbr draft strain. Under-both bumping anddraft strains, the rollers 25 have very slight frictional en- -ageinentwith the cooperating-wedge suraces 21 and 23, and infact, have a rollingmovement thereon, so 4 l mitted thereto under either bumping or draftstrains is niultipliedand Yconverted into force teiidin blocks 22- aiidto orce the chafing plates 26 thereof a ainst the cooperating rictionalsurfaces 0% the thrust box 13-44. `Otherwise stated,'with theseinterposed .rollers or antifriction devices and cooperating wedge surthe op e under draft strains the "said thrustthe that the force trans--to separate the Wedge eosaiae .faees. the friction producing pressurebetween the members 13 and 22 or other fric.-

tionally engaging lparts will be very muchgreater than the raft orbumping strains that produce such pressure through Ythe buffer springA17. From this it of course follows that said buffer s ring iiiaybe verymuch lighter. than wou d be required .in a 'device employinvr,cooperating wedgesurfaces having sliiiiig or lfrictional engagementwitheach other. i l anti-friction devicesI are, therefore, very iinpo'rtaiitfeatures and I 'believe that in a Yde- -viee of this kind thecombination thereof with 'wedge surfaces and frictionally en gagin partsis broadlv new, and I desire to claim the saine bron. l

i lAs .is evident, the device described is adapted to be arranged withthe rollers 25 upright '.or in vertical position, 'inasmuch The saidrollers ofi' as the thrust boi:` and parts contained therein are-adaptedtobe inserted between the draft plates 3 and the prongs of the draftyoke 9 when turned on then' longitudinal axes ninety degrees from theposition shown in lthe drawings. Furthermore, thrust box and parts contined therein are jndapted to be turned bod ly, end for end, and thenapplied between the followers and other cooperating parts.

-I claim "as my invention:

1. The combination with members to be cushioned, of a cushioning spring`and tionally engaging partsinterposed between said members, cooperatingwed e surfaces havin relative movement under oroe transtheVSaidfricmitte` to said spring, and rollersor antifi-iction devicesinterposed between said wedge surfacesand havin lrolling engagement withbothtliereof and adapted to convert the Spring force into' a forcepressin the frictional members into contact, the sai frictionallyengaging arts and spri cooperating to cushion t- 1e movements o thesubstantially as described.

4the combi said members, n

2, In a friction draft rigging nationwith the draw bar, spring and'acting friction membersLof ya wedgeand anti-friction rollers one oneach side -of the wedge and each havin a rolling actonpn both the wedgeand tie adjacent friction member, substantially ass ecified.

In testimoiiv whereof I a 'x my signature in presence o tivo witnesses.j 4 FRANKLIN L. BARBER. 'Witnessesz H. D. KiLooiie, `F. D. Meaonm'r. i

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